[WINED3D] Add check for GL Shading Language 100 Extension

[Phil Costin]

This patch adds the D3D Caps check for the GLSL OpenGL
ARB_shading_language_100 extension. GLSL will be used for shader model 2.0,
3.0 and possibly future 4.0 support. Use
GL_SUPPORT(ARB_SHADING_LANGUAGE_100) to check for this extension.

Dependencies:

Applies to Mike McCormack's tree after Ivan Gyurdiev's 3 patches.


Files changed:

include/wine/wined3d_gl.h
dlls/wined3d/directx.c
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